Troy police sent every available unit to a home on North Lake last week expecting to find a teenager trapped in a closet while a group of armed men roamed his house.

Instead, they found the teenager yelling "Swatting! It's swatting. It's a prank!"

Swatting is a relatively new take on an old prank, according to the FBI. The scheme typically involves someone calling 911 and faking an emergency that warrants an immediate response from law enforcement -- often a SWAT team.

In this case, Fox 2 reports the Troy teen was playing Xbox 360 online when a fellow teen gamer from Boston threatened to swat him. Police say the suspect placed a 911 call through a hearing impaired service -- apparently re-routing the call so it appeared to come from the home in Troy -- and said he was hiding in a closet while armed gunmen fired shots.

Detective Robert Redmond told the television station officers confiscated the Xbox with hopes of identifying the prankster. If you've played Xbox Live, you know it's easy to access a list of gamers you've recently played with, and we imagine Microsoft could help them figure out the suspect's identity.